Machine for grinding lenses



(No ModeL Ll ES MAGHINE FOR GRINDING LENSES. N0. 449,947. Patented Apr. 7, 1891.

hi g NW5 v UNITED STATES PATENT OFFICE.

LEWIS REESE, OF CHICAGO, ILLINOIS.

MACHINE FOR GRINDING LENSES.

SPEGIFIGATION forming part of Letters Patent No. 449,947, dated April '7, 1891.

Application filed June 16, 1890. Serial No. 355,684. (No model.)

To all whom it may concern.-

I Be it known that I, LEWIS REESE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have lnvented certain new and useful Improvements 1n Machines for Grinding and Polishng Optical Lenses, which are fully set forth in the following specification, reference being had to the accompanying drawings, forming a part hereof, and in which- Figure 1 shows my said improved machine 1n elevation, partly in section. Fig. 2 shows a plan view of the same.

Like letters refer to like parts.

The object of my invention is to construct a machine for grinding and polishing optical lenses of any desired form, such as hyperbolical, parabolic, spherical, 850., and to attain such ends 1 construct my said improved machine substantially as follows, namely:

On a base 6, consisting of a central boss or hub having several arms, is erected a central and'stationary shaft a, provided with aloose sleeve d, held to the shaft by abinding-screw, and upon said sleeve rests and turns another sleeve or tubular shaft 1), extending to near the top of the shaft a. Said shaft is shown in section above the drum j. To the lower end of said shaft is attached a gear 0, which turns it and the drum j, attached thereto, and also the channeled flat ring 11,, carried on arms 0, having a hub and set-screw to fasten to the shaft b, as shown, and above said ring is mounted a ring g, having arms g and a hub resting on said fixed hub, through which the shaft b passes freely, and above the drum j is a duplicate ring g, having arms g Said rings each have lugs 9 which are continuations of said arms. Through the outer ends of said arms pass vertical rods or posts f, which rest on the base 6, and thus hold the said rings 9 in a fixed position. Into said rings are cut notches g, which form bearings for the shafts h, which are provided with pulleys h, over which and the drum j pass belts 7a to turn and hold said shafts in place. Said shafts carry at their lower ends the chucks 77F, to the lower ends of which the glass disks ql are attached for the purpose of grinding them into the desired shape. For the purpose of giving the desired shape to said glass the ring a is protached a pulley m; also a crank Z, so that either hand or other power for driving may be used. Said gearing, the shaft 1), ring '11., and drum all turn together, and said drum turns the shafts h, which may be placed as near as circumstances will permit, each having a belt k to both turn and hold it in place. Said rings 9 and 'n, are also shown in section.

When all the parts are constructed and placed as shown, the channel in the ring n is charged with grinding or polishing material and motion given to the mechanism, thus causing said channeled ring to revolve around the axis of the shaft a and under the glasses 2, which each revolve on their own axes, which is but a continuation of theaxis of the shaft h.

The device here shown is particularly adapted to the m akin g of lenses of forms heretofore unattainable in practice, such, more especially, as the hyperbolical, elliptical, and all other forms.

What I claim is- 1. In a lens grinding and polishing machine, the combination, with the channeled and moving member a and fixed shaft ct, carrying a tubular shaft 19, which carries a fixed drum j, of the fixed members g, carrying shafts h,

actuated by belts from said drum,and mechanism to rotate said tubular shaft, substantially as specified.

2. In a lens grinding and polishing machine, the combination, with the channeled and moving member n, shaft 1), and drum j, fixed to said shaft, and shaft a, of the vexteriorlynotched and fixed members g, carrying revolving shaft-s provided with chucks centered with the center of the channel in the member 01, substantially as specified.

LEYVIS REESE.

WVitnesses:

WM. ZIMMERMAN, S. LAURENCE. 

